Windmill.



H. G. MGGULLUGH.

WINDMILL.

APPLICATON FILED DEG. 5.\191O.

1,0%,1 l 3., Patented 0131. 17, 1911.

'3 SHEETS-SHEET 1.

H. G. MUULLOGH.

WINDMILL.

APPLICATION FILED 1350.5, 1910.

Patented Oct. 17, 1911.

3 SHEETSfSHEET 2.

H. G. MGOULLOCH.

WINDMILL.

PPLIOATION FILED DE 3 SHBETS-SHEET 3.

HARRY G. MCCULLOCH, yOF FREEPORT, ILLINOIS, ASSIGNOR T0 THE STOVER MANU-FACTURING COMPANY,4 OF FBEEPORT, ILLINOIS, A CORPORATION OF ILLINOIS.

WINDMILL.

Loomis.

Specification of Letters Patent.

Application' led December 5, 1910. Serial No. 595,644.

tures of construction and arrangement of parts which result inadvantageous and efficient operation of the assembled structure andwhich will be described at length in the following specification.

Some of the advantages and objects of the present invention will beapparent as the invention is better understood by reference to theillustrations of one particular embodiment thereof which is shown in theaccompanying drawings.

@ne of the objects of the invention is to` increase the efficiency andpromote the utility of a device of this character by/applying thelifting force to the pump rod approximately in its plane ofreciprocatlon.

Another object is to provide mechanism unconnected with the mill-vanefor `applying the brake to the windmill only when the vane is swung intoclosed position by the attendant.

Still another object is to permit freedom of movement of the vane forgoverning the mill without applying the brake, thereby obviating thedanger of applying the brake when the wind-wheel is partially facinginto the wind.

A further object is to reduce the number of bearings and shafts to aminimum and to simplify the general structure of the device withutsacrificing its strength and efficiency.

Other objects and advantages will become apparent from the followingdescription and accompanying drawings villustrating one preferredembodiment thereof.

Referring to the drawings-Figure 1 is an elevation of a mill embodyingmy invention. Fig. 2 is a top plan view thereof. Fig. 3 is a partialelevation taken on the line 3-3 of Fi 2; and Fig. 4 is a sectionalelevation on th line 4-4 of Fig. 2.

On the drawings 10 designates the apex portion of a windmill towerprovided with the usual cap 11. A cast frame or bedfpiece 12 forming theframe or support for the operating parts of the mill lis provided with atubular portion 13 which projects downwardly through the cap 11 andforms with the cap a swivel-support for the mill.

The main shaft 14 is suitably journaled in bearings provided in the bed12 and has Xedly' secured thereon in spaced relation a pair of drivingpinionsl. The outer end of the shaft has fixed thereon a head 16 forminga hub for the wind-wheel (not shown) which may be of any well known orpreferred type.

A driven shaft 17 is suitably supported in parallel relation with thedriving shaft 14 in a bearing 17 upon thebed 12. To either end of theshaft 17 there is fixedly secured a gear 18; said gears being positionedto mesh with and be driven by the driving pinions 15. To the outer faceof each of the gears 18 there is journaled at 19 a pitinan or connectingrod 20. The upper ends of said pitmen are secured by a pin 21 to a head22 which is vertically reciprocable in suitable guideways 23 and hassecured to its lower end the ordinary pump rod 24. The guideways 23which rise from the main bed of the mill are so positioned that the pumprod is guided in a vertical plane which intersects the gears 18tangentially to the orbits of the journals 19 by which the connectingrods 20 are seclged to the gears.

Itis well Vknown that the greatest force must be exerted upon the pumprod when it is moved upwardly and it is obvious that by eliminating thelateral thrust which prior to my invention has been exerted upon thecross-head bythe pitman, I am able to materially reduce the friction ofthe crosshead in its guides and thereby increase the efliciency of themill. By disposing the guides so that the pump rod is positioned in aplane tangential to the orbits of the journals 19 the connecting rods 20are in a position to exert a direct upward thrust upon the cross-headwhen the maximum speed of the pump rod in the upward direction iseffected. In other words the speed of the journals 19 in an upwarddirection is greatest when they cross a horizontal plane coincident withthe axis of the shaft 17, and if at this time the lifting force of thegears 18 is applied to the cross-head in a vertical Patented Oct. 1'?,1911.

' ments of the vane may take place withoutdirection without any lateralthrust against the guide members 23 the maximum etliciency of theapparatus will be attained.

An arm 25 projects beyond the gears for the purpose of supporting theupper end of a rod 26 upon which the vane rail 27 is mounted by means ofa bifurcated casting 28. The vane of the mill (notshown) is attached tothe vane rail in the usual manner. A overnor consisting of a torsionspring 29 coi ed around the rod 26 and'secured at its upper end to a rodby an arm 30 loosely journaled on the rod and suitably retained in-position bya bolt 31 passing through an arm 32 fixed on the rod, thelower end of the spring being secured to the casting 28, tends tomaintain the vane in the open position shown in Figs. land 2. In thisposition of the parts, as is well understood, the windwheel is held withits face to the wind. If the velocity of the wind rises above apredetermined .point the vanewill swing back-` wardly, viewing Fig. l,against Vthe force of the governor spring to throw the wheel partiallyout of the wind for purposes of protection. 1

A brake consisting of a flexible steel band 33`having one end fixed at34, encircles the hub 16 and is provided at its other end with a bolt35. A bell-crank lever 36 is pivotally mounted upon a stud 37 projectingfrom the bed of the device and has its horizontal arm slotted at 38 forthe reception of the bolt 35 which is secured therein by nuts 39. Asecond bell-crank lever comprising a long arm 40 and a short arm 41ispivotally'mounted upon the bolt 42; the short arm 41 being connected tothe depending arm of the bellcrank lever 36 by a link or rod 43. Thelongarm 40 is bent upwardly at its upper end to provide a vertical extendingportion 44 which, when the mill is in operative position, is disposedadjacent the vane rail 27. Since the spring-buffer 45 which isinterposed in the path of an arm 46 projecting laterally from thecasting 28 limits the opening movement of the vane to the position shownin Fig. 2, and since the bell-crank lever 40, 41 is not connectedA withthe vane it will be evident that the governing moveaffecting the4 brake.The vane may even swing to closed position against the stop 47 withoutsetting the bralge for the reason that the brake is in no way associatedwith the governing movement of the mill. For the purpose, howeyer, ofsimultaneously swinging the vane to closed position and applying thebrake 33 there vis provided a chain 48 connected at one end with the arm40, which is trainedover a pulley 49 carried by a laterally extendingarm 50, and over the guidepulley 51 from whence it extends to the bottomof the tower where it may be manipulated by the attendant in the usualmanner to throw the mill out of the wind. When the chain 48 is drawndown by'the attendant the arm 40 is swung rearwardly, viewing Fig. 1,carrying with it the vane rail which 1s engaged by the vertical portionof the arm 44. It will be evident that vthis movement of the bell-cranklever 40, 41 will pull uponthe link 43 and swing the bellcrank lever 36to depress its horizontal arm and apply the brake arm to the hub of thewind-wheel. When the chain is released the governor spring 29 will swingthe vane into the position shown in Fig. 2, which will carry with it thebell-crank lever 40, 41 and release the brake.

It will be evident from the above description that the brake is entirelyindependent from and is not affected by the normal governing movementsof the mill vane, and that it is impossible to apply the brake until thewheel has been thrown nearly or completely out of the wind. This featureobviates the danger of breakage to the mill which has heretoforefrequently occurred where the brake has been connected directly with thevane so that closing movement of the vane applied the brakeautomatically. In this construction the application of the brake isabsolutely under the control of the attendant while the releasing of thebrake will be automatically Vaccomplished when the vane swings into openposition under the iniiuence of the governor spring.

From-the foregoing it is thought that the construction, operation andmany advan- 1 00 tages of the herein-described invention will beapparent to those skilled in the art without further description, and itwill be understood that various changes in the size, shape,

proportion and minor details of construction may be resorted to withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

What I desire to claim is:

1. In a windmill, the combination of a driving shaft, pump operatinglmechanism connected therewith, a wind-wheel head secured on said shaft,abrake adapted to hold said shaft against rotation, a vane, a governortherefor, and means for swinging said 115 said lever is operated to setthe brake the vane is'closed-'therebybut when the brake is released thevane may close without affecting the brake.

'3. In a Windmill, the combination of a driving shaft, pump operatingmechanism connected therewith, a wind-whee1 head secured on said shaft,a brake for said head, a swingingly mounted vane, and a. lever iconnected with said brake and having one 1c end disposed in the" path ofsaid vane, whereby opening movement of the vane will release the brakebut closing movement of the vane will not affect the brake.

HARRY G. MCCULLOCH. Vitnessesz ETHEL A. SHANNON, J. H. STEARNS.

